I made a few changes to your function. This is how I'd do it:

Function MAINquery(ByVal board As String, ByVal chassis As String, ByVal hDDType As String) As System.Data.DataSet
     Dim connectionString As String = "Provider=Microsoft.Jet.OLEDB.4.0; Ole DB Services=-4; Data Source=C:\Documents an"& _
"d Settings\Desktop\FinSample.mdb"
     Dim dbConnection As New System.Data.OleDb.OleDbConnection(connectionString )

     Dim queryString As String = "SELECT [System].* FROM [System] WHERE (([System].[Board] = ?) AND ([System]."& _
"[Chassis] = ?) AND ([System].[HDDType] = ?))"
     Dim dbCommand As New System.Data.OleDb.OleDbCommand
     dbCommand.CommandText = queryString
     dbCommand.Connection = dbConnection

     dbCommand.Parameters.Add("@Board", System.Data.DbType.String).Value = board
     dbCommand.Parameters.Add("@Chassis", System.Data.DbType.String).Value = chassis
     dbCommand.Parameters.Add("@HDDType", System.Data.DbType.String).Value = hDDType

     Dim dataAdapter As New System.Data.OleDb.OleDbDataAdapter
     dataAdapter.SelectCommand = dbCommand
     Dim dataSet As New System.Data.DataSet
     dataAdapter.Fill(dataSet)

     Return dataSet
 End Function

-Peter

Note the name of the parameters is mostly irrelevant in the above case. What's important is the ORDER. They must be added to the parameters collection in the same order they are used in the command text.

-Peter

Peter and Prashant, thank you guys so much, I honestly don't know what I'd do, you have both helped me to get the query working as perfect as it could.

Thank You.

D

I create the same table in access the same row and bound it to a datagrid , i am getting the row perfectly,
This leaves me with only one clue,

Your DB Path is:

C:\Documents an"& _
"d Settings\Desktop\FinSample.mdb

But usually the all paths to Desktop I have seen will be something like like
"C:\Documents and Settings\Administrator\Desktop"
Ie, you have the Loggedin user Administrator before the Desktop

I may not be correct, but please do ensure that you are using the same db, because you might be checking the db on your desktop through access, and the program will be working on another. It happens sometimes...

regards
Prashant