Temperature Gauge Not Reading

[carfree123]

Hello. I installed a transmission temp gauge today. I installed a tee in my transmission fluid line with the temp probe. I connected the white wire on the probe to the 'S' port on the back of the gauge and I connected the black wire to the negative side of the battery. (Basically, I followed the instructions)

I took my car for a drive and the gauge hasn't moved at all. Did I do something wrong? My boost gauge works fine, but its mechanical. Not sure whats going on.
This is the GlowShift tinted series transmission gauge.

Thanks in advance.

Problem is resolved.