First ensure that this is not a leak in the basement wall. Click here for details on Waterproofing a basement wall.
Second ensure that the wall is well sealed, especially around electrical outlets and floor and wall joints. Click here for details on Air Sealing.
Finally, make sure there is no air spaces left between the insulation and the basement wall. Click here and scroll down to below grade walls to learn about Air Spaces in Walls -- Myth and Science.