Probably a registry error caused during an install or uninstall of software. MSVCR71.dll is associated with drawing drop down boxes so if it's registry entry gets corrupted you lose function for anything that calls it.

1.  Scan for malware and virus infection, if your .DLL was compromised go to step 6.

2.  Download CCleaner and run the registry tool to cleanup your registry. Use the option to make a backup of the current registry in case you need to restore.

3. Check in the C:Windows System32 folder for the MSVCR71.dll, If it is there you will need to update the registry entry. Make note of the date on the file for later reference.

4.  Start>Run> type " regsvr32 MSVCR71**.dll**  "  minus the quotes

(Don't be nervous, nothing is being added to your system at this point simply forcing a refresh of an existing registry entry.)

5.  Try the script again. 

6.  If this does not work then check if there is a newer version of the .DLL available.

7.  Unzip the newer  .DLL to the correct location (Still no need to worry as this is something that is supposed to be installed already)

8.  Repeat steps 4 and 5

Post back with results