Problem with Windows 2003/iis/php5.1.2

My first question is: Will eaccelerator conflict with the memcache.dll extension already in use (are they for the same purpose)?

Installation issue:
downloaded: eAcceleratorCVS213_5.1.4.dll
placed it in c:\php\ext (with other working extensions)
renamed it to eAccelerator.dll
added line 'extension=eaccelerator.dll' as first extension in php.ini
created folder c:\php\cache
added the following to bottom of php.ini

[EAccelerator]
eaccelerator.shm_size="64"
eaccelerator.cache_dir="c:\php\cache"
eaccelerator.enable="1"
eaccelerator.optimizer="1"
eaccelerator.check_mtime="1"
eaccelerator.debug="0"
eaccelerator.filter=""
eaccelerator.shm_max="0"
eaccelerator.shm_ttl="0" ( I have used 3600 = 1 hour)
eaccelerator.shm_prune_period="0" ( testing 1800)
eaccelerator.shm_only="0" (testing 1 this seem noticeably faster?)
eaccelerator.compress="1"
eaccelerator.compress_level="9"
eaccelerator.content = "shm_and_disk" (testing)

Result
nothing new displays in info.php page
mediawiki(was working fine)now timesout.