Fill method of data adapter operating slow.

public DataSet Execute_StoreProc_DataSet(string psStoreProcName)
		{
			DataSet dsResult= new DataSet(); 
			UtilParams objParams;
			SqlConnection objConnection=null;
			SqlParameter objSqlParams=null;
			SqlCommand objCommand=null;
			SqlDataAdapter objSqlDataAdapter=null;

			try
			{
				objConnection=getConnection();
				objCommand= new SqlCommand(psStoreProcName,objConnection);  
				objCommand.CommandType=CommandType.StoredProcedure;
                objCommand.CommandTimeout = 0;
				
				IDictionaryEnumerator en = mhtParamCollection.GetEnumerator();

				while (en.MoveNext())
				{
					objParams=(UtilParams)en.Value; 
					objSqlParams = new SqlParameter();
					objSqlParams.ParameterName=objParams.ParamName;
					objSqlParams.SqlDbType =(SqlDbType)objParams.ParamType;
					objSqlParams.Direction=objParams.Direction;
					if (objParams.Direction==ParameterDirection.Output)
					{
						objSqlParams.Size=objParams.ParamSize;   
					
					}
		
					objSqlParams.Value= objParams.ParamValue;
					objCommand.Parameters.Add(objSqlParams);  
				}
				objSqlDataAdapter= new SqlDataAdapter(objCommand);
				objSqlDataAdapter.Fill(dsResult);  
				return dsResult;
			}
			catch(Exception Ex)
			{
				//ErrorHandler objERR = new ErrorHandler();
				//objERR.WriteError(DateTime.UtcNow +  ", DAL.DBUtility-Execute_StoreProc_DataSet(): " +  Ex.Message.ToString() + " " + Environment.UserName, Environment.UserName);
				throw;
			}
			finally
			{
				objCommand.Dispose();
				objSqlDataAdapter.Dispose();
				if (objConnection.State ==ConnectionState.Open)
					objConnection.Close();  
			}
			
		}