Item Editor for sprites larger than 32x32?

[lexus21]

Im looking to add new item to otclient.
I was created new .dat .spr for 10.98 - 64x64px.
But item editor dosen't see this sprites

> OTB version 57.
> Loading client files.
> Client version 1098.
> Failed to get image for client id 100. Check the transparency option.
> Failed to get sprite id 2
> Failed to get image for client id 100. Check the transparency option.

any hint?