AutoCAD 2010 Home Use - 32-Bit and 64-bit installs - Different Serial Numbers?

[rlayaoen]

We have a 5 seat network license for AutoCAD 2010.  I have three employee home users, two wants to install 32-bit version of AutoCAD 2010, and one employee user wants to install the 64-bit version.  We requested and received a home use serial number from autodesk, which stated that we could use it for 5 home use installs.  The serial number worked for the 32-bit installs, but will not work for the 64-bit install.  The 64-bit install will only be the third home use license.  Any suggestions on how to remedy this issue.  Is a different serial number required to install the 64-bit version of the same software (autoCAD 2010)?

Thanks Much......

[hashim.mundol]

Usually serial numbers are not specific to 32 bit or 64 bit.

If you are installing Autocad 2010, serial number should, Do you get invalid serial number error ?

did you have any other version of Autocad installed on this machine earlier ?