XF 2.2 Asset upload doesn't keep value

[DohTheme]

Hello,

I have the "Node Background" option on the "Node" edit page. I changed the way the user change node background from String

<xf:textboxrow  />

to the new asset upload

<xf:assetuploadrow />

It works perfectly but the input doesn't keep the value, I mean when uploading an image and refresh the page I can't find the link of the image in the input.
How can I make it keep this value.

Best Regards