UBB.threads PHP Forum Software Community Forums UBB.classic UBB.classic 5 Support intermittent connection failures

I've setup my new UBB (upgraded from free). Everything seems to work. But 99 out of 100 times I go through the 'Update Threads' or 'Index' features in the control panel, the browser spins off into infinity and I get a connection failure error.
The 'Update Threads' goes through 1 or 2, or even up to 8 threads then goes flatline. Any ideas.
Much thanks for the help.