UBB.threads PHP Forum Software Community Forums UBB.classic UBB.classic 6 Support rebuild index option goes to blank screen

Unfortunately, the server I use requires a IP address for access. I was told that you guys cannot produce a static IP so basically, I'm on my own...

And one forum has about 7000 topics with about 15,000 posts - So, would it be a good idea to arhive this forum now? Then try to rebuild the search index.