shdoclc.dll "file can not be registered"

Getting this error when a user tries to print a Mapquest map:

"an error has occured in the script on this page"
Line:228
Char:1
Error: interface not registered
Code:0
URL: res//c:\windows\system32\shdoclc.dll/preview.dlg"

I tried to register the dll via cmd: "regsvr32 shdoclc.dll" and got the message:

"shdoclc.dll was loaded, but the dllregisterserver entry point was not found. This file can not be registered"

I checked the properties of shdoclc.dll and from my limited knowledge deduce that it is supposed to be a self-registering file. But I could be wrong (of course).

I then tried to load a fresh copy of shdoclc.dll in a sad attempt to get it to register. Didn't work.

I have read the other posts regarding "file can not be registered" but I don't see exactly how they apply.

Any ideas?