I know this is not the mantis bug tracker, but our team are getting lots of cases where you ask for a report and we get "Cannot display web page"

'test case assignment overview' - website cannot display web page
'results per tester per build' - never comes back with any results
'test result matrix' - website cannot display web page
This is a real shame as we use Testlink extensively for a team of 30 testers!!
These reports used to work - any ideas where to look for the problems? Or is there a way to export the data to Excel to do it there instead?
[Edit: TL.193 & MySQL runs on a CENTOS 5 Linux server)