Cube is not appearing in Data target tab of Infopackage

Hi,

I am updating data from a flat file.

I created Infosource and Data target and Update rules also.

After Infopackage creation when I go to Data target Tab

My cube (data target) is not appearing.I deleted my Infosource and 0nce again I created then also I couldnot see my Data target in Infopackage.

Can any one hlep to resovle.

Thanx in Advance.