Lassen SK II

Hello all,
I am searching for an example code or a library in order to implement the lassen SKII GPS with my arduino (Manufacturer page → http://www.trimble.com/embeddedsystems/lassensk2.aspx?dtID=support ; Datasheet → http://www.jancorver.org/info/aprs/files/lassenskii_man.pdf)
I have already tried to implement it myself with the TSIP protocol, but I failed, because the module was retrieving me bad data, the answer does not even contain the DLE and ETX bytes.
With hope you can help me