Error = -2147467259 (80004005) Error string: [DBNETLIB][ConnectionOpen (Connect()).]SQL Server does not exist or access denied.

Hi All,
Yesterday one of my jobs failed and from the job history i got the message below could you please anyone help me out to solve this issue
Server SHSQLFILT01
Job Name Transfer SNs (and returns) to Shipley
Step Name Transfer HU
Duration 00:00:42
Sql Severity 0
Sql Message ID 0
Operator Emailed
Operator Net sent
Operator Paged
Retries Attempted 0
Message
Executed as user: FILTRONICzsqlservice. ... DTSStep_DTSActiveScriptTask_1 DTSRun OnFinish: DTSStep_DTSActiveScriptTask_1 DTSRun OnStart: DTSStep_DTSExecuteSQLTask_1 DTSRun OnError: DTSStep_DTSExecuteSQLTask_1, Error = -2147467259 (80004005) Error string: [DBNETLIB][ConnectionOpen (Connect()).]SQL Server does not exist or access denied. Error source: Microsoft OLE DB Provider for SQL Server Help file: Help context: 0 Error Detail Records: Error: -2147467259 (80004005); Provider Error: 17 (11) Error string: [DBNETLIB][ConnectionOpen (Connect()).]SQL Server does not exist or access denied. Error source: Microsoft OLE DB Provider for SQL Server Help file: Help context: 0 DTSRun OnFinish: DTSStep_DTSExecuteSQLTask_1 Error: -2147220440 (80040428); Provider Error: 0 (0) Error string: Package failed because Step 'DTSStep_DTSExecuteSQLTask_1' failed. Error source: Microsoft Dat... Process Exit Code 1. The step failed.

i had gone through this url and find the network connectivity issues but both of my servers pinging each other still my jobs fails please find the DTD Package which
may have issues:--DTSRun /S "shsqlfilt01" /N "Transfer Foreign Returned Serial Numbers (new to new)" /A "Customer":"8"="Filtronic Comtek" /A "CustomerFacility":"8"="Filtronic Shipley" /A "ChildErrorDesc":"8"="Failed to create children of this serial number" /A "EX_Database":"8"="ATE" /A "EX_Server":"8"="10.86.5.10" /A "EX_UserName":"8"="snimporter" /A "EX_Password":"8"="sn1mp0rter" /A "IM_Database":"8"="ate" /A "IM_Server":"8"="shsqlfilt01" /A "IM_UserName":"8"="snimporter" /A "IM_Password":"8"="sn1mp0rter" /A "Workflow":"8"="Made In Suzhou" /A "SNErrorDesc":"8"="Serial number not found on foreign database" /A "TCVErrorDesc":"8"="Failed to create foreign serial number" /A "DefaultDespatchStartDate":"7"="01/01/2004" /A "FailedToRegisterDesc":"8"="Could not add this serial number to a return" /A "InitialStatusDesc":"8"="Information Complete" /W "0" /E