problem with psp cfw enabler

i downloaded this cfw enabler from qj.net and it worked fine for a while but now whenever i turn it on i get the message "Unsupported firmware detected.Pls turn off psp" I have version 5.03 chickHEN R2 and a psp 2000

P.S.The wierd thing is my plugins like HOLD+ still work even with the error message...