Failed to instantiate file "TopAnswer.webpart" from module

Error:

Failed to instantiate file "TopAnswer.webpart" from module "WebPartPopulation": Source path "dwp\TopAnswer.webpart" not found. Troubleshoot issues with Windows SharePoint Services.

Solution:

This error will occur, if you applied only the WSS 3.0 SP2. You may not installed Office Server SP2.

I wrote a simple solution in another post. Just go through the url and install Office Server SP2.

http://sensoft2000-sharepoint.blogspot.com/2009/07/moss-2007-database-attach-error.html

MOSS 2007 Database Attach Error

Error:
The specified SPContentDatabase Name=WSScontent_2009 Parent=SPDatabaseServiceInstance Name=Microsoft##SSEE has been upgraded to a newer version of SharePoint. Please upgrade this SharePoint application server before attempting to access this object

Solution:

Dont get confused with other solutions. Just install Moss 2007 SP2. Thats it.

Google about "wssv3sp2-kb953338-x86-fullfile-en-us.exe" and install this service pack first. And then install "officeserver2007sp2-kb953334-x86-fullfile-en-us.exe"

Sometimes you will get error during the Office Server SP2 (Not WSS 3.0 SP2). At that time, try to extract the MOSS SP2 in some other location and then execute the .msp file from the newly extracted folder.

Command to extract the exe: 

officeserver2007sp2-kb953334-x86-fullfile-en-us.exe /extract:"c:\mosstemp\"

Once the files are extracted, execute the "coreserverwwsp2.msp" file.

Thats it...