lost subforms references

[roula_lsjm]

i have a Mainform contain command button (CMDB) and an unbound subform (UNBS). on the click event of the CMDB button i put

UNBS.SourceObject = "frmfabtest"

i call a form named "frmfabtest", this form contain a subform , when i click CMDB all the references i used in the frmfabtest and the suborms are lost, and he asked me to enter the references as parameters

can anyone help me please

remark : the form frmfabtest work properly if i open it directly

thanks