From what I can see in the data sheet you should be using this:
I2CRead I2C_data,I2C_clock,$F1,[druck,druck2]
I don't know what the 0 you had there was for but the R/W bit is set by the I2CRead/I2CWrite command, you don't need to set it.
also check what you have druck and druck2 declared as, byte or word.
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