unable to enable WmJDBCAdapter package

hello all

iam unable to enable the Wmjdbcadapter package. when iam trying to unable it iam getting an error message as

Startup service wm.adapter.wmjdbc.admin:registerAdapter was not found in WmJDBCAdapter package

can any one suggest me how to proceed from here

thanks in advance

with regards
venkata ramesh naidu medicherla