ASIO4all is not a ASIO driver, it's a 3rd party generic driver which is actually a wrapper for WDM/KS drivers.
You would only use it if all else fails to work.
You should download and use the latest ASIO drivers from the Tascam web site first. Remove ASIO4all from your system or it will conflict.
You still didn't give us any information about your system specs which is important in your scenario.
What is your computers specs , and which OS version, 32 or 64 bit?
Tascam and windows XP 32 bit are well known to have issues.