While Exporting to pdf  from report, I got this error(File I/O Error).  I know this is related to permission problem.  One thing is, its working fine in my local machine.  But in deploying machine (windows server 2003) raising error.  I applied full permission for report folder to NETWORK SERVICE and ASPNET user also.  But no solution.  Can you give me the possible solution?  One more thing i can export one report which is designed help of  VIEW.  Others ( Not working) are created from XSD.  It was working well before,  but now its showing error.
Thanks in advance.

I resolved my problem.  In my case,  I got version problem in crystal report.  I am using both bundled version as well as cr9 full version.  I designed reports using these both designers.  Normally we refer 4 crystal dlls.  That can be ver9.2.3300.0 /9.2.9500.0.  In my case, the solution is to deploy your web project by building web setup and deploy it in your server machine.  This is resolved my problem.