.bin file is being erased when converting from .xml to .bin

Im working on a repaint right now, and i'm editing the .xml. when i am done converting with serz the bin file goes from 32kb to 1kb. and only has one line of text in it. whats going on?
Before:
<cBlueprintLoader xmlns:d="http://www.kuju.com/TnT/2003/Delta" d:version="1.0">
<Blueprint>
<cEngineBlueprint>
<Name d:type="cDeltaString">EMD GP35 DRGW</Name>
<BrowseInformation>
<iRailVehicleBlueprint-cBrowseRVInformation>
<DisplayName>
<Localisation-cUserLocalisedString> ETC.
After:
<?xml version="1.0" encoding="utf-8"?>
This is the only line of text that shows up.
Before:
<cBlueprintLoader xmlns:d="http://www.kuju.com/TnT/2003/Delta" d:version="1.0">
<Blueprint>
<cEngineBlueprint>
<Name d:type="cDeltaString">EMD GP35 DRGW</Name>
<BrowseInformation>
<iRailVehicleBlueprint-cBrowseRVInformation>
<DisplayName>
<Localisation-cUserLocalisedString> ETC.
After:
<?xml version="1.0" encoding="utf-8"?>
This is the only line of text that shows up.