Internet Explorer 6 and above has a function for privacy that can lead to problems with display of tracking results for some shippers. In short the reason is that standard configuration of these does not allow setting of cookies from third party websites.
The affected countries are:
- Belgium - emstaxipost.be
- Czech Post - cpost.cz
- Malta - worktrace.com
- Portugal - ctt.pt
- Singapore - speedpost.com.sg
- Slovenia - worktrace.com
- Thailand - thailandpost.com
To make these work with track-trace the following procedure has to be followed.
When the result page is displayed an icon appears at the lower right as shown below.
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Doubleclick the icon. The list below is displayed.

Find a line containing the correct domain. See the list above if you're not sure of the domain. Doubleclick this line and the window below appears.

Select the option "Allways allow this site to use cookies" and click OK.
The next time you track the result should be displayed correctly.