Has anyone successfully read a Philips 8591 using PBP? I can "talk" to virtually any other device I have come across, but this one has me stumped.

Can someone tell me what I'm doing wrong? And yes, I have pull-ups on the SCL and SDA lines!

Code is below.
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PCF8591 CON %10010000

SetupI2C:

DevAddr = 0
DevAddr = DevAddr << 1
DevAddr = PCF8591 | DevAddr
I2CWRITE PORTC.4,PORTC.5,DevAddr,$44,[0] ; Use internal clk, auto-increment mode
RETURN

ReadI2C:

DevAddr = 0
DevAddr = DevAddr << 1
DevAddr = PCF8591 | DevAddr
I2CREAD PORTC.4,PORTC.5,DevAddr,[PSByte1,PSByte2,PSByte3,PSByte4] ; Read all 4 channels

RETURN