abaqus impact analysis

Hello

i have created a model in abaqus for dynamic impact, evrything is according to program`s help but it  does not work,

 about the model:

there are 2 parts in model, one is fixed and the other has velocity toward the first part,

the second parts comes near the first part but no impact occur,

could anyone help me to finish this and help me to understand why it doesnt work?(if  attache the model)

or does anybody have any sample of impact like it to send to my email?(or attache here)

thanks for your replies