BackWPup https error

WordPress 3.5.1
BackWPup 3.0.5
Destination FTP

Getting the following error running job

The HTTP response test get a error “SSL certificate problem, verify that the CA cert is OK. Details: error:14090086:SSL routines:SSL3_GET_SERVER_CERTIFICATE:certificate verify failed”The HTTP response test get a false http status ()

Site is HTTPS using a Go Daddy SSL hosted on our own hardware using Windows 2008 r2 and IIS 7.5

http://ww.wp.xz.cn/extend/plugins/backwpup/