รบกวนสอบถาม ช่วยดูโค้ดให้หน่อยครับว่ามันผิดตรงไหนครับ Incorrect Syntax near '12'.

ConnectionStringSettings conSettings = ConfigurationManager.ConnectionStrings["ApplicationDatabase"];
String ConnectionStrings = conSettings.ConnectionString;
try
{

if (txt_CommitReqKey.Text != "" & txt_ProjKey.Text != "")
{
conn = new SqlConnection(ConnectionStrings);
conn.Open();
cmd = new SqlCommand("DELETE FROM CommiteeReq WHERE CommiteeReqKey = " + txt_CommitReqKey.Text + "and DocDT=" + txt_DocDate.Text + "and ProjKey =" + txt_ProjKey.Text + "and ProjCode =" + txt_ProjCode.Text + "and ProjAlias=" + txt_ProjAlias.Text + "and ProjName=" + txt_ProjName.Text + "and ContractID=" + txt_ContractID.Text + "and ContractDate=" + txt_ContractDate.Text + "and CustomerKey=" + txt_CustomerKey.Text + "and CustomerName=" + txt_CustomerName.Text + "and ContractAmt=" + txt_ContractAmt.Text + "and ContractVat=" + txt_ContractVat.Text + "and ContractTax=" + txt_ContractTax.Text + "and ContractTaxPercent=" + txt_ContractTaxPer.Text + "and ReqNote=" + txt_ReqNote.Text + "and ReqValue=" + txt_ReqVal.Text + "and ReqValuePercent =" + txt_ReqValPer.Text + "and NetReqValue=" + txt_NetReqVal.Text + "and DiscNote=" + txt_DiscNote.Text + "and DiscValue=" + txt_DiscValue.Text + "and NetTotal=" + txt_NetTotal.Text + "and Note=" + txt_Note.Text+"", conn);
cmd.ExecuteNonQuery();
MessageBox.Show("ลบข้อมูลใช่หรือไม่");
ClearForm();
conn.Close();
}
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
}
finally
{
conn.Close();
}