Can't foreward mails from inbox

[shenix2005]

I installed stable version 0.6 on courier server, every thing is fine except  a strange issue that when i foreward a mail from my inbox, the message 'sending' appears with the rotating wheel, and RC hangs.
But it is perfectly working when i compose a new mail and sending,
The mail error log file says nothing but the system log says 'error-file not found'

Pls help on this

[shenix2005]

I further checked and found that, it can be send if the option 'forward as attachment' is selected.
Again, save to drafts is also not working.