tm6000 module does not find firmware, despite being there

Hello,

I run a Terratec Cinergy Hybrid Stick with the tm6000 module. The modules loads fine, but sometimes I see this message:

xc2028 8-0061: Error: firmware xc3028-v27.fw not found

Actually, the firmware file *is* there in /lib/firmware. What does this error mean? Does it have any importance?

Thanx
Malte