If that were the problem then John's suggestion should work, because I would be isolating the two pings, no?
None of you would happen to know of any examples of circuits/code implementing two ultrasonic sensors that I could model my project off of would you?
John was giving you the standard code that 100s of people have probably used. If your system still
doesn't work, then you probaby have "2" problems, first was the code problem already mentioned,
second is some electrical/hookup/hardware problem.