Firewall Error

Yesterday in unknow reason my firewall end to work. Below scrren shot . Anyone had the same error and know the reason??

I'm using Windows XP SP3 (I'm using also Windows 7 beta but in Win7 everything is ok).

http://img22.imageshack.us/img22/8991/erroresetss4sn7.png


Edit:

I tried to delete this files: C:\Documents and Settings\All Users\Application Data\ESET\ESET Smart Security.

* epfwdata.bin
* EpfwTemp.dat
* EpfwUser.dat
to restore default settings but didn't work.


So I uninstalled SS and installed a RC version and everything is OK now .