Help IMP not runing

[Pavel Sorejs]

I have IIS 5(win2000) and MySQL.
I see this errors if i trying to load IMP page from horde:

Warning: Constant no_action already defined in ./lib/imp.lib on line 23

Warning: Constant send_message already defined in ./lib/imp.lib on line 42

Warning: Constant mailto already defined in ./lib/imp.lib on line 52

Warning: Use of undefined constant LOG_LOCAL4 - assumed 'LOG_LOCAL4' in
./lib/imp.lib on line 631

Warning: Cannot add header information - headers already sent by (output
started at ./lib/imp.lib:23) in session.inc on line 407

Fatal error: Call to undefined function: posix_getpid() in session.inc on
line 114

Can enybody help me ???
(pleaz)