insert data into sql database works locally but only sometimes on server

hey guys 
as the subject . i have a page that inserts a number of textboxes into a database . when i test it locally it works but when i test it on a server pc it works 90% of the time and 10% it doesnt . cant seem to find out why . anyone have any solutions 

heres my code for the button 
static int count = 1; protected void Votebtn_Click1(object sender, EventArgs e) { VoteClicklbl.Text = count.ToString(); SqlConnection conn = new SqlConnection(dbcon); try { if (string.IsNullOrEmpty(this.HotelNametxt.Text) || string.IsNullOrEmpty(this.Initivetxt.Text) || string.IsNullOrEmpty(this.Q1txt.Text) || string.IsNullOrEmpty(this.Q2txt.Text) || string.IsNullOrEmpty(this.Q3txt.Text) || string.IsNullOrEmpty(this.Q4txt.Text) || string.IsNullOrEmpty(this.Q5txt.Text) ...