have you tried hanging the bell. and do you carry toby out to go to the bathroom? if you do---then he might not get that he has to walk to the door. every 30 minutes, just say "ok, toby, lets go out" and then hit the bell repeatedly and say "outside, outside outside". gruffi was 5 weeks old when we got him. and we started the bell thing when he was around 7 weeks old. and we left the harness on him throughout the day. and when it was time for him to go, we'd just put the leash on him....walk him out (so that he knows the way), and i'd show him the bell and hit it a bunch of times saying "look, outside". he learned to hit the bell by 10 weeks old. and he abused the bell priviledge till he was 5 months old. even when he sniffed the bell when he was 9 weeks old. i'd say "ok, lets go outside".
you could also have the stop watch on you, and then not go at 30 minutes and then watch toby.....and when he starts to circle---interrupt him and take him on a leash to the door. but if he pees....drench the area with natures miracle.
and if you dont want to take him out every 30 minutes...limit his water intake. just give him water every 3-4 hours.
right now i'm trying to teach sprite and ellie to not go potty on the wee wee pads anymore. so what we're doing is watching them...if they go near the pads i say "HEY lets go outside" and then they follow me. and at night i pick up the water at 7pm, take them to go potty at 7:30pm. then we sleep from 8pm-5am and when we wake up we take them outside. so they havent used the wee wee pads for the past 3 days. and it looks like sprite really likes how excited i get when she goes potty outside.
and make sure you dont punish or yell at toby when he goes potty inside...but if you catch him say "uh uh, outside" and take him out.
sprite was potty trained by 6-7 months so that she wasnt missing the wee wee pad. ellie was trained by 5 months (she learned from sprite) and gruffi was a pain in the ass (just cuz he wouldnt make it into the night till he was 9 months old----he would ring the bell in the middle of the night at around 1am. but he hasn't had an accident since he was 3 months old----but thats because my mom ignored the bell). just hang in there. toby will get it!!