Thank you for taking the trouble to write again. I am sorry that you are still experiencing difficulties with the wifi connectivity. Last week (Nov 7 - 13th) we were experiencing a number of problems particularly with laptops using the Vista or Windows 7 platforms.
I am hoping these problems have now been resolved
If you continue to have problems in the LRC it would be worth trying to connect elsewhere in the University (eg Costas or the Campus Centre) or you could log on to one of the LRC desktop pcs and use your network space for your assignment.