Sorry for your trouble. This is a hard one to solve without seeing the actual MIB.
Make sure that the URL is entered correctly and that you have selected it to be a jump link.
Make sure that the object you are jumping to does actually exist.
If these suggestions does not help you, please send us the MIB with instructions on how to replicate the problem (where the link is, where it should go etc.) and we might be able to figure out what is going on.