I tried both B2C2 direct and B2C2 SDK options in Device dialogue in DVB Dream.
I am able to move my motor OK with MiBi DiseqC for SS2 v1.10, and with AltDVB 2.2 under Win XP 32 bit (but not under Win 7 x64). When I move the motor with them and scan a satellite with DVB Dream it works fine
I use SG2100.
I've been communicating about driving my motor with the author of SmartDVB (JackJavo), and, thanks to JackJavo's brilliant research into the subject we were able to get the motor moving with SmartDVB both under Win XP 32 bit and under Vista x64 via WDM drivers for SS2 v4.5. Here's a little info from JackJavo's e-mail that might shed some light onto the motor issues under DVB Dream. Hope it helps:
For the motor to work under Win 7 x64 and Xin XP x32 with Smart DVB 1.5 I was given a modified version of Sky2PCAVSrc.ax by JackJavo. I attach it to this post. But the latest version of DVB Dream 1.5 does not move the motor either with the original or modified Sky2PCAVSrc.axStill this rotor business is strange. The one i have here now i have tested it with a ss2 also it's a sg2100 as u have and i verified that it only moves by continually trying to tune after sending the diseqc command. This is also how your motor moves. When connected to the twinhan i have here it won´t move, probably because the bda tuning works differently as the wdm ss2. I now have another user with a hh120 (stab rework i think) and this rotor it seems will only move if i wait after it before trying to tune (it moves in the waiting period). Maybe this is why altdvb has this rotor type selection box as it looks like you need to handle specific rotors differently. Also come to think of it it could be that dvbdream works with a waiting period also as it works for that user, this would also explain why your rotor will not move with dvbdream as reloc probably doesn´t have a tuning mechanism working in the case of a sg2100.
Please try and do something about it!!!