Warning: fopen(/home/1675/domains/networktemple.com/html/forum/attachments/8/0/4/435.
 

Out of the blue I'm my forum users are getting following error whenever they tried to download an attachment

Code:
Warning: fopen(/home/1675/domains/networktemple.com/html/forum/attachments/8/0/4/435.attach) [function.fopen]: failed to open stream: No such file or directory in [path]/attachment.php on line 283
I have made no changes to the database or had changed any setting.

Please urgently assist.