I'm having a similar issue. It appears that the path is no longer valid on that server. Can you help me choose the correct dovecot and path for my version?
Linux cloudhost01.cvgeeks.com 2.6.18-194.11.1.el5 #1 SMP Tue Aug 10 19:05:06 EDT 2010 x86_64 x86_64 x86_64 GNU/Linux
Thanx in advance.