MSM430 firmware update

Hi

i've one MSM430 configured in controlled mode...

AP has an old version of firmware and i cannot modify via CLI funcional mode from controlled to autonomous...

I've a new versione of firmware

V5.7.5.0-MSM410-MSM430-MSM460-MSM466-MSM466R-B19542.cim but i've no idea how load it into AP: i've read a lot of post and i'm using TFTP32 but TFTP do no start with a series of error...

I don't know if a need a startup.cim file or no...

can give me any suggestion ?!?

thanks

claudio