The key for WPA-PSK with TKIP can either be between 8 and 63 ASCII characters or exactly 64 hexadecimal characters. You might find it easier to change the key to something more manageable.
To do this, connect your laptop to the router by ethernet cable, *NOT WIRELESSLY*, type its IP address of 192.168.2.1 into your web browser and this will open its configuration pages. In the wireless security settings replace the existing key with one of your own, using between 8 and 63 ASCII characters. This can include spaces, so you can use a phrase that's familiar to you.
Having done this, you will need to remove the existing wireless "profile" in the laptop click here and go through the procedure to "Connect" again, when a new profile will be saved.
[ASCII characters are basically the numbers, letters and symbols on the keyboard. The hexadecimal characters are "0" to "9" and "a" to "f" only, a total of 16 available characters.]