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Skype uses port 80 by default. If it gets in first it prevents Apache using port 80. Completely exit Skype (on a Windows 7 machine you need to go to the taskbar and right click/quit the Skype icon) and then start the Apache service. You can then restart Skype and it will use another port. Alternatively force Skype to not use port 80 and 443: In Skype | options | advanced | connection untick the "use port 80 and 443 as alternatives for incoming connections". This should also solve the problem.
Trying to log into Open-Audit Enterprise but keep getting placed into the Community edition.
Some users may run into the issue of being unable to access Open-Audit Enterprise features even though they are licensed for it. This could be an issue with http redirect causing problems for the communication between Open-Audit Enterprise and Open-Audit itself. This is controlled by the config option oae_server located in /usr/local/omk/conf/opCommon.nmis under the openauditenterprise section. The default value for this is http://127.0.0.1/open-audit/ and changing this to https://127.0.0.1/open-audit/ will resolve this issue in many cases.