Match Pattern does not function properly when searching for a null character

[Xooch]

I'm using Match Pattern to extract a null terminated string from a response I'm getting from a device on a serial port. The VI is attached and below is a screenshot of the block diagram.

It works just fine with index set to 0, 1, or 2. When index is 3, I get the output shown below.

Why is Match Pattern not finding the null character?

Thanks!

[Xooch]

By the way, Labview 2011.

[Xooch]

Oh, I should also mention that the string control/indicators are set to hex display mode...

[Xooch · Accepted solution]

I'm a dope, need to remove the wire from the Offset control to the Match Pattern control.

DUH!