Web applications implemented in ASP.NET use several standard procedures to pass session-specific data between the client and the server. The Module for ASP.NET testing facilitates the work with such web sites by adding the following features to WAPT. The set of internal WAPT functions is extended with two additional ones responsible for the extraction of ASP.NET-specific values from the server responses. Automatic parameterization is performed with help of these additional functions ensuring the correct substitution of dynamic values in all cases independently from the notation used to pass the data. The recorded profile does not require additional parameterization work to execute ASP.NET sessions correctly.