Max 168 bits encryption

[rocky]

According to the documentation the server shoul support encryption from 0-N bits.
Although I can't connect to my server if I set the encryption higher than 168 bits. What can be wrong?
Is it my FTP-client?? I'm Using FlashFXP 2.1 build 924.
Or is it something else??

[darkone]

1. 168bits is more than plenty enough. (I'd consider even 96bits sufficient for data transfers)
2. Limit is set by SSPI (Security Support Provider Interface), and afak it currently is 168bits.