Thx for the quick response. I've been away for a few days so wasn't able to response any sooner.
I try to connect via the sftp://user

ass@host

ort/path format.
The connection details are not stored flashfxp but in an other application and from there i start flashfxp.
Now i execute
FlashFXP.exe -remotepath="/htdocs" sftp://user

ass@host:22/htdocs
But i would like to remove the pass and add the Common Name of the private key added in the Certificate Manager. Or just use the path to the private key (DSA with pass phrase).
If you should decide to implement the later of the 2, then flashfxp should ask for the pass phrase everytime you connect to the host. For security this would be better i think because you don't need to save your pass phrase in flashfxp.