i have been in this house for over 3 years and never had this problem. first off let me tell you about the set up in my house, i have two bathrooms the small one has just a toilet and a sink and the other is a full bathroom. the problem i am having is in the small bathroom when i flush the toilet it fills up and there is a gurgling noise in the sink and about 30 seconds later the toilet drains, and in the big bathroom when i flush the toilet it flushes full speed and it sends the gurgling noise to the small bathroom.....I dont know what could be the problem so please help me with this!

Thanks

robert