Update Query

Question

plz help me......
cmd.CommandText = "update item_creation set item_name='" + txtIname.Text + "',item_code='" + txtIcode.Text + "',item_group='" + cmbUgroup.Text + "',unit='" + cmbUnit.Text + "',Sale_price='" + txtsprice.Text + "',Pur_price='" + txtP_price.Text + "',MRP_price='" + txtMrp.Text + "',Self_Price='" + txtScost.Text + "',Comments='" + txtComments.Text + "',currency='" +cmbPgroup.Text + "' where item_name='" + name.ToString() + "'";
 please help me to find the syntax error in this statement.i am sitting with this for several hours.but i cant get it.....its urgent....plz........