Pic18f2553 Port C problems

[alanwms]

Gents -

I,m having an issue with port C bits 4, 5, and 7. Currently using bit 6 as TX for display - Works fine
Bits 0 - 2 as I/o work fine

Can't get bits C4, C5, C7 to switch on as outputs and simply trying to beep with C4
Tried new chip, attempted different configurations for the osc - Currently using 8mhz internal

I put a simple routine to turn on and off the outputs but read nothing with a meter:
I notice that C3 is not available on this chip, and I suspect a conflict with the chip configuration. Is this something you can help me with?

[alanwms]

Never mind - Those port C pins are input only, although FC7 allows me to select those pins as outputs even though they are not available as outputs.