Dmitry,
For a check I quickly did this one (testdata.dbc):

Procedure AddCustomer
USE testdata!customer In 0 Alias myCustomer
Append Blank in 'myCustomer'
replace cust_id with Right(Sys(2015),6),Company with ".Net company-"+Ttoc(Datetime(),1)
use
endproc

ASP.Net page with a single button to call procedure:

    protected void Button1_Click(object sender, EventArgs e)
    {
	string strConn = "Provider=VFPOLEDB.1;Data source=d:\\temp\\testdata.dbc;";
	OleDbConnection cn = new OleDbConnection(strConn);
	cn.Open();
	OleDbCommand cmd = cn.CreateCommand();
        cmd.CommandType = CommandType.StoredProcedure;
	cmd.CommandText = "AddCustomer";
	cmd.ExecuteNonQuery();
        cn.Close();
    }

It worked. Each time I click I get a new customer.
Cetin