Bob, you might want to try cutting the loop off an old leash or cotton line or get one of these: http://www.leerburg.com/leashes.htm#drag
Then leave the leash on (without touching it or tugging at all) for 1 or 2 minutes, one or 2 hours off, another 1 or 2 minutes, etc, until he gets used to it for that length of time, and whenever you put the leash on, give him a treat so he associates putting it on with something good. Give him a couple of treats while he has it on as well, don't worry if he's laying down. Work your way up to longer sessions with the leash on. It may not take as long as you think.

The reason I recommended a leash without a handle is so if he gets up and starts walking around, the loop at the end won't get caught on something and jerk him (keeping a negative experience from happening).

When he starts walking around on his own with it on and isn't paying any attention to the leash anymore, then you can start holding the leash, NOT tugging, and treat when you hold it. Then take one or two steps forward, NOT tugging, slack on the leash and call him to you. When he comes, treat him and praise him. Continue this way, lengthening the distance, still slack on the leash, until he begins to follow you willingly, then you can walk around with him. Try this in the house first, then outside in the yard before going out for a real walk. It won't take long at all.

Bob, in my post above, when I said "(old) cotton line" I'm referring to a long lead like this one, nothing thinner (not a rope) and you should always be around to supervise while the dog is wearing it: http://www.leerburg.com/leashes.htm#cotton

Just wanted to clarify for the sake of your dog's safety.

Bob,

First, make sure the the puppy is used to wearing the leash in general like some of the above posters have mentione. Next, when you start walking him I have found it helpful to give a light touch near the backside of the dog when he doesn't feel like moving.

It's not in the same place for every dog, for mine it's just in front of the rear hip bones. This get's her attention and seems like a jump start. Once he starts to move then keep him interested in following you. Sometimes a slow jog for a short period will make you more interesting to follow too.

A trick I saw on the Dog Whisperer with a dog with a similar problem is to carry or drive the dog a block or two away and then walk him home. This associates a positive experience with the leash and should get him moving.

Just things I found helpful with my pup when getting her used to walking on the leash.

Keith

Bob:
I didn't think you were a bad man.

IMHO the first three things a puppy should know (in this order) are

His name. Get some hot dogs (the really cheap ones) cut them into really small pieces. The goal isn't to feed him, but to put the taste on his tongue. During your bonding sessions you use his name over and over and over and .... while loving him up. Hearing you say his name should make him happy.

Teach him to come to you. You and your wife, girlfriend, significant other, life partner, whoever, sit on the floor maybe five feet apart. Take turns calling the pup by saying his name, then come. When he gets to you he gets a treat and lots of affection I mean over the top like he won the Nobel prize for physics. For him, going to you when you say come should be the equivalent of taking a six year old to Disneyland. For that puppy Bob, you should be the happiest place on earth. Slowly increase the distance until one of you is around a corner.

No. Without crushing his spirit he needs to know that the word no is a real show stopper. Continuing with anything he's doing after hearing the word no should be unpleasant.

This should be done ASAP, they are for the puppy's personal safety. The advice of putting a small piece of clothes line on the pup's collar is very sound. Put it on, take it off. Every day put a longer piece of line on his collar. relate the known to the unknown. A six inch piece of clothes line isn't a leash to you, but once he becomes accustomed to it you can keep making longer ones. He won't know the difference. Also, getting the clothes line put on should be a happy thing.

Keep sessions three to five minutes long, but frequent.