Read error. Internal import error.

Hi, upgraded LO to version (Windows XP SP2) and this error appears when trying to open any Calc files (xls or ods) even in the ones that were created in LO Calc.

The other programes in LO work perfectly just this one.

I can open Calc and create new docs but can’t open saved files.

Any ideas on what to do? Already renamed user fold, uninstalled and deleted regestries and reinstaled and the error remains. Also tried to install an older version but the same continues.

Thank you