HTML BLOCK code is gone

I created a new page and I draged the box to the active area. I edited the html-block options and I also changed the code in (.htacces) so the new page could open in a new window. (The new page opens in a new window) I pasted some code in the pop up window and at preview everything looks the way I want it. But after saving the code is gone. I also used the SQL option to insert the code mrpowless video recomended. But the code is not written. This issue who should take 15 min is now an eternity.

Anyone who knows why the code is not saved? 

It's a browser thing, this happens in Internet explorer, try Firefox and it should work.

It's fixed now. I changed the <input type="submit" value="Save"> to

<input type="submit" value="Save" onclick="tinyMCE.triggerSave(true,true)"; />