That tag should work. But there are a few items that could help.
1. If the device you are working with is using Windows Mobile OS, there is an emulation parameter called WEB Alternate Browser Support. This is Disabled by default. Try toggling that to Enabled. (only works for Windows Mobile devices)
2. In the emulation parameters, there is another WEB setting, called WEB Engine Type. This is set to Enhanced by default. Try setting that to Standard.