ColdFusion Server 5: Hot Fix for Applets When Using Java Plug-in Versions Greater Than 1.3.1_01a
Java plug-in 1.3.1_01a (and any version greater than that) does not allow leading underscores in names (for Internet Explorer only. ColdFusion 5 uses two parameters which start with an underscore: _CF_form_name and _CF_param_name. This causes the applets (cfgrid, cftree, etc.) not to operate with Java plug-in versions greater than 1.3.1_01a.
This article describes the solution and provides a patch.
ColdFusion Server 5: Hot Fix for Applets When Using Java Plug-in Versions Greater Than 1.3.1_01a