Outlook Express Win2K SERVER

How can I fix msoe.dll error. Aftar instaling service pack 2 for win2k Server i receive error- Outlook Express could not be started because MSOE.DLL could not be loaded. I use IE 5.5 4807.2300IS which was installed whith dsl VERIZON software – thisis customized version of IE and update version SP2 Q319182