Syntax error in FROM clause error '80040e14'

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Microsoft OLE DB Provider for ODBC Drivers error '80040e14' 

[Microsoft][ODBC Microsoft Access Driver] Syntax error in FROM clause. 

/asatid/search.asp, line 32

this is my code

<%Dim sqlstring

dim objConn 

set objConn = server.CreateObject("ADODB.Connection") 

objConn.open("ostad") 

sqlstring = "SELECT * FROM ostad"

If Request.Form("TypeSearch") = "lname"

Then

sqlstring = sqlstring & " WHERE lname LIKE '%"& Request.Form("DaInBox") & "%'"

End If

If Request.Form("TypeSearch") = "skill" 

Then

sqlstring = sqlstring & " WHERE skill LIKE '%"& Request.Form("DaInBox") & "%'"

End If

If Request.Form("TypeSearch") = "study_paper" 

Then

sqlstring= sqlstring & " WHERE study_paper LIKE '%"& Request.Form("DaInBox") & "%'"End If

dim rsSearchset rsSearch = server.CreateObject("ADODB.Recordset")

line 32rsSearch.open sqlstring,objConn,, adLockOptimistic, adCmdTable