i edited your config & removed comment lines,
this error:
Fri Feb 24 17:13:48 2012 Cannot open dh1024.pem for DH parameters: error:02001002:system library:fopen:No such file or directory: error:2006D080:BIO routines:BIO_new_file:no such file
means that openvpn couldnt locate dh1024.pem file,
use absolute path name (like you did in ca,cert,key directives)
or you didnt build dh params at all...
cheers,
Michael.