toby did this too, i feel your pain
he is getting better though, toby actually managed to slip out and into traffic AND wouldnt come when we called, that was a big wakeup call for us... we have been using cherrios and randomely saying "come" when hes not really paying attention, he is getting rather good at it... i think the next step for us is to either go to an ENCLOSED area where we can let him off teh leash and practice, or get one of those really long leashes to practice with him out in the open..... it has really been a step by step process for us: (lol..... i say "us" as in my fiance and i, but toby only listens to me, if my fiance gives toby a command toby looks at him like "yeah right")
first, we STOPPED chasing him altogether. He loves the "chase me" game and we indulged him all the time,... not anymore, no more chasing (although now i think he kows the differnce between play and serious time)
second, we called toby to "come" randomely throughout the day/night using his favorite treat, and then treat or praise, and eventually we will get to praise only but we are not tehre yet.
Third, (we havent gotten here yet either) after youre dog has mastered the above, graduate to an enclsed area or put youre baby on a LONG leash and practice outside in teh open (there will be distractions so dont get frustrated when youre baby gets a little sidetracked)