PIC communications

I have two PICit kits and I am trying to communicate between the two.
The transmitter uses the PIC16f630 with the following code...
loop:
Serout PORTC.2, 300, "UUU"
WaitMs 33
Toggle PORTC.1
WaitMs 33
Toggle PORTC.1
Goto loop
I can see the square wave data from portc.2 using an o-scope.
This output pin is connected to the RX pin PORTC.5 of a PIC16f1459
I am trying the following code but It appears the interrupt is never called.
Any suggestions?
Thank you.

loop:
For i = 1 To 5
Toggle PORTC.1 'toggle LED for testing
WaitMs 20
Toggle PORTC.1
WaitMs 5
Next i

INTCON.PEIE = 1
Enable

UsbService
Toggle PORTC.3 'Another test to see if loop is active
WaitMs 20
Toggle PORTC.3
WaitMs 2


Goto loop
End
On Interrupt
Serin PORTC.5, 300, an3
Resume


'USB stuff below:




feature_report_received:
Toggle PORTC.2
an2 = an2 + 2

Return

feature_report_before_sending:
UsbFtBuffer(0) = x(0) 'UsbFtBuffer(0) - 1
UsbFtBuffer(1) = x(1) 'usbftbuffer(1) - 1
UsbFtBuffer(2) = x(2) 'UsbFtBuffer(2) - 1
UsbFtBuffer(3) = x(3) 'usbftbuffer(3) - 1
UsbFtBuffer(4) = x(4) 'usbftbuffer(4) - 1
UsbFtBuffer(5) = i 'I can see how many data points were sent
UsbFtBuffer(6) = an2
UsbFtBuffer(7) = an3
Return

output_report_received:
'Toggle PORTC.3
'WaitMs 200
Return

input_report_before_sending:
UsbIoBuffer(0) = 3 'usbiobuffer(0) + 1
UsbIoBuffer(1) = 1 'usbiobuffer(1) + 1
UsbIoBuffer(2) = 4 'usbiobuffer(2) + 1
UsbIoBuffer(3) = 1 'UsbIoBuffer(3) + 1
UsbIoBuffer(4) = 5 'usbiobuffer(4) + 1
UsbIoBuffer(5) = 9 'usbiobuffer(5) + 1
UsbIoBuffer(6) = 1 'usbiobuffer(6) + 1
UsbIoBuffer(7) = 5 'usbiobuffer(7) + 1
Return