Blank iNotes email

Hi

We have iNotes Domino Web Access running on one server. It has been working fine for approx 18 months. Then for some reason when users tried to log in they got a Domino Web Access Warning. To fix this was to delete their temp internet files which worked fine and they were able to log in. But then if they went into a new email they just got the square outline of the email and it just stayed there. These users use GPRS (wireless) If you put the same machine on the network - it all works fine. If you use the standard webmail temlate - works fine. I have added the web site as a trusted site, I have enabled/ disabled HTTP 1.1, I have disabled/ enabled file compression, I have enabled/ disabled active x but still nothing and now I am completely confused as to what is happening. I know the cause - which was to clear out the temp internet files but why would it now stop something from loading

Please help someone

Thanks

Mark