w550 beginner 2 flashing need help

[djtetei]

ive tried setools lite and xs++ but both have dropped out. Whats FW mean?

I've done some research about SE W550 vs. XS++ 2.2 issue and my answer to you is like this.
Both SETool2Lite and XS++ are great programs for flashing SE mobile phones, but there is one catch: SETool2Lite is the freeware version of the same unofficial but commercial software (the best in this branch), while XS++ is a software developed with help from the guy who wrote SETool2.
For the moment, it seems that XS++ has a thing against SE W550.

Conclusion:
You want to bring your phone back to life and to be sure about its performance, it would be a good ideea to reflash your W550 MAIN, FS and CDA files with SETool2 Lite 1.08.

I'm sure that SETool2 Lite 1.08 will solve your problem.

GOOD LUCK!