Apache will not start

[morph3us]

Hello, pleased that I joined the comunity, I start with a rookie problem, I installed apache 2.2 and php 5.2.17 in "c:/Program Files/" and I have configured httpd.conf:

# Start PHP integration
LoadModule php5_module "c: / Program Files/php5.2.17/php5apache2_2.dll"
AddType application / x-httpd-php. Php
PhpIniDir "c: / Program Files/php5.2.17 /"
# End PHP integration

but unfortunately, then apache will not start!! Do you have some advice?

ps
I apologize for my English:)

[morph3us]

Hello, I solved by replacing the version of "Not Thread Safe VC6 x86" with "VC6 x86 Thread Safe" Now start apache and php working properly.
But can you tell me what are the differences between the two versions of php?