just for the records-could not find a post with that error message:
was having issues when updating my RFM. Error message on the P2000 updater was: "cannot connect on com1"
Finally, after checking connectors and settings on my PC the culprit was inside the original PC: the serial DSUB9 port on the side was internally connected on the wrong port -make sure it is connected to COM1 on the motherboard !
Update went well using win XP pro and the existing serial port.
I luckily found this solution by watching a random P2k update video and the guy was having the same issue...pure luck...I would have wasted lot´s of time...
Finally with V2.1 installed everything is prepared for the shaker to be built and implemented