Take a look at the end of the coax. I've seen them snipped off and the copper wire get flattened a bit. Not a lot but just enough to cause issues when pushing into the connector.
The problem is the threads don't match. The female connector in the cable modem/router seems to be thinner than the standard one. I am able to screw the coax cable into all the other devices except this one. Does this require a special coax cable?
