how to update a mainform into a subform

Hey there anyone would yous be so kind to help me because im troubleshooting this error now for a week found no luck

after I edit information and change the information and click update it gives me a error i tried the parenthesis brackets no luck :confused:

Error im getting( Too few parameters Expected 1. Run time error '3061')

Heres my code I think theres a bug in my code:

Private Sub cmdUpdate_Click()
Dim strSql As String
strSql = "UPDATE PlantTransaction " & _
"SET TransactionID=" & Me.txtTranID & _
",[Plant Number]='" & Me.txtPlantNo & "'" & _
",TransactionDate=#" & Me.txtTransDate & "#" & _
",Opening_Hours='" & Me.txtOpeningHRS & "'" & _
",Closing_Hours='" & Me.CloseHrs & "'" & _
",Fuel='" & Me.txtFuel & "'" & _
",[Fuel Cons Fuel/Hours]='" & Me.txtFuelConsFuelHr & "'" & _
",[Hour Meter Replaced]='" & Me.txtHrMtrRep & "'" & _
",Comments='" & Me.txtComments & "'" & _
",[Take on Hour]='" & Me.txtTOH & "'" & _
" WHERE TransactionID=" & Me.PlantTransactionQuery.Form.Recordset.Fields("Tr ansactionID")
Debug.Print strSql ' <- prints to Immediate window
CurrentDb.Execute strSql, dbFailOnError
cmdClear_Click
Me.PlantTransactionQuery.Form.Requery
End Sub

Any help will be very much appreciated Thanks in advance!!!