My environment is Windows 2000 server , php4.0.4 and access 2000 database.
My application is that I using ASP to get all customer name from DB to build a drop-down list. Once user select 1 item, the ASP will get customer name to generate <img src="showchart.php?c_name=xx"> to call php script.
The php script get the content of c_name to query all sales data from db for this customer.Then, it using these data to generate a purchasing distribution chart for this customer.

For the first few times, it works fine. However,after about 20 user selection, it become unstable. It sometime works and sometime give me internal server error 500 message.
In some case, it not just give me error message, but it make other asp and php program cannot access DB again.

I have change the PHP script to read data from user input,it works fine (even after 100 selection).
Also, the application can works (even after 100 selection)on Windows NT 4.0 platform