Error validating file, Cannot play PR!

[Tenke420]

Hey guys,
its been over five months since iv played PR,
i had to re-install it and all,
now i cant even play due to some issues,
i cannot start up my PR game, once i click on PR to start,
this message pops up.
" Invalid File
20: Error validating file:
C:\documents and Settings\HP_Administrator\Application Data\EA GAMES\Battlefield 2\mods\pr\bin\Reality.BF2.dll


A required certificate is not within its validity period when verifying against the current system clock or the timestamp in the signed file
(0x800B0101) "


Iv got no idea how to fix this issue,
i can play Battlefield 2 no problem,
just can't play PR,
which is the only reason why i re-installed BF2..
Some help would be greatly appreciated,
Thank you very much!
hope to be on the Battlefield soon!

[LITOralis.nMd]

Welcome back Tenke,

Solution:

Roll your computer clock back to March 15 2014. Launch PR, and it will offer an update. Update the game. Once the update is successful, change your computer clock back to the current date/time.

Cya on the battlefield,

[Tenke420]

Thank you !
games updating right now,
so i don't see why it shouldn't work from here,
Thanks again!
looks like i'm going to lose some sleep tonight before work