4x4 Stuck in 4L on 2004 Dodge Ram 1500

Put in 4lo but will not go into 4hi or 2wd. 4lo light is on when i turn button to 4hi or 2wd the light blinks with 4lo light still on solid. 4wd light is on in dash is automatic and elect 4wd.

Asked by for the 2004 Dodge Ram 1500