Extremely long page load time only in Vanilla mod?

When one clicks the link in the Tools drop-down to enter the Vanilla Forum, the page takes a very, very long time to load. It does eventually load, but I'm talking about it taking up to 2 minutes. Same with posting a new thread, or comment to a thread.

I do not have this problem with any other link on the Tools drop-down menu, only the Vanilla Forum link.

Any ideas / suggestions?

Thanks in advance for your help.