Dynu.com DDNS automatic update

[tucano]

I'm trying to use a script to update my ip on OBh 5.2 using Crontimer, on other images I used it always worked fine, since I started OBh it stopped working, the content of the script is this:
wget -O ~/dynu/dynuLog "

http://api.dynu.com/nic/update?username=USERNAME&password=PASSWORD

"