[Forestry]

I've had serious trouble getting 1.4.6.2_bc2.2 on my server, but I have had luck with version forestry-1.4.6.1-mcpc1.2.5-r7

Just put a z in front of the zip folder's name and it should work.

Also, checking the modloader.cfg file to ensure that forestry loads AFTER industrialcraft should also help.

[What server hosters support Tekkit?]

I've had great experience with Fragnet.net, running a 12 person tekkit 3.04 with them at the moment.