I just recently procured a used 1130A InfiniiMax differential probe for use with my MSO7104A scope. Unfortunately, I have run in to a rather major issue - the scope is not recognizing the probe. About three seconds after I plug it in, the scope pops up an error message that says there is an unsupported probe connected. The scope also does not switch the input to 50 ohms, like it does with the 1156A and 1158A probe I have. According to the Agilent documentation for infiniivision series probing, the 1130A is listed as 'recommended' for the 7000 series. Does anyone know what might be going on here?