db error when trying to add new mail scanner.

I get the following db error when trying to add new mailscanner

Sat Jun 24 16:40:45 2017,754 [94407] DEBUG vtigercrm - Prepared sql query being executed : SELECT * FROM vtiger_mailscanner WHERE scannerid = 
Sat Jun 24 16:40:45 2017,755 [94407] DEBUG vtigercrm - Prepared sql query parameters : [4]
Sat Jun 24 16:40:45 2017,755 [94407] INFO VT - PearDatabase ->ADODB error  Query Failed:SELECT * FROM vtiger_mailscanner WHERE scannerid = ::->[0]

in page error https://www.dropbox.com/s/kw4d3crjgiryswm/Screenshot%202017-06-24%2013.22.45.png?dl=0

now the entire app freezed up when i go to mail converter.