Agilent DSO5054A waveform read problem

I'm using the Agilent DSO5054A with GPIB connection.

I tried to get a driver but there are two ...

DSO5054A Drivers

Which one should i use?

I already have installed the IVI driver but there is the problem that the signal on the oscilloscope starts at 0 V and ends at 2.5 V on the y-axis but in my LabView programm it starts at 700 mV and ends at about 1350 mV...

Can you pls tell me what I'm doing wrong?