from a quick look you didn't use the exp4_retribution MasterTechDefs. the one from crusade lacks hypergates.
the specific code used by the game:
<Tech>
<InternalName>MasterSpacialManipulation</InternalName>
<GenericName>SpacialManipulation</GenericName>
<DisplayName>MasterSpacialManipulation_Name</DisplayName>
<TechTree>Master_Tree</TechTree>
<ShortDescription>MasterSpacialManipulation_ShortDec</ShortDescription>
<Description>MasterSpacialManipulation_Dec</Description>
<FlavorName>SpacialManipulation_FlavorText_DisplayName</FlavorName>
<FlavorShortDescription>SpacialManipulation_FlavorText_ShortDescription</FlavorShortDescription>
<FlavorDescription>SpacialManipulation_FlavorText_Description</FlavorDescription>
<ColorDef>TechOrange</ColorDef>
<Icon>GC3_Enginering_Tech_Icon.png</Icon>
<Bink>GC3_Interstellar_Craft_Temp.bk2</Bink>
<ResearchCost>32</ResearchCost>
<TechPoints>1</TechPoints>
<Tags>Hulls</Tags>
<Tags>Critical</Tags>
<AICategoryWeight>
<Military>30</Military>
<Growth>25</Growth>
<Tech>25</Tech>
<Diplomacy>25</Diplomacy>
<Expansion>25</Expansion>
<Wealth>25</Wealth>
<Influence>25</Influence>
<Fortification>25</Fortification>
</AICategoryWeight>
<Prerequ>
<Techs>
<Option>ArtificialGravity</Option>
</Techs>
<TechAge>
<Option>AgeOfExpansion</Option>
</TechAge>
</Prerequ>
</Tech>
can't say what if any other tech changes retribution made over crusade so if you just cut and paste that into your tech you might be missing other changes ect. depending on how much you've changed thought it might be helpful tho.