You may try a disk cleanup of the module as explained here
http://sbkb.cisco.com/CiscoSB/GetArticle.aspx?docid=5da3ed7d016641baa6251ce72e3cb62d_Perfo
rming_Disk_Cleanup_on_CUE_Service_Module.xml&pid=2&converted=0
If this does not help then perform a clean installation of the CUE.
HTH
Manish