I am trying to label a layer of line vectors using SLD in Geoserver. It is simple enough, and it's pretty much copied from the SLD cookbook: <http://docs.geoserver.org/latest/en/user/styling/sld-cookbook/lines.html>

The thing that's getting me is that when I view the Openlayers preview in Geoserver, everything seems to render correctly. Each road is only labeled once and it's not extremely busy looking. However, when I import the layer via WMS to my Openlayers map, it doesn't seem to recognize this line:

```
<VendorOption name="repeat">400</VendorOption> 

```

Which is supposed to keep it from repeating within 400 pixels. 

I've also tried: 

```
<VendorOption name="group">yes</VendorOption> 

```

Which should only display a single label on a map per unique text.

Any idea what is going on here? I need the labels to look like the Geoserver preview.

Map displayed in openlayers after importing layer via WMS:
[![WMS Served Map](https://i.stack.imgur.com/2K4rG.png)](https://i.stack.imgur.com/2K4rG.png)

Map displayed in Geoserver Openlayers preview:
[![Openlayers preview](https://i.stack.imgur.com/f5X24.png)](https://i.stack.imgur.com/f5X24.png)

`<?xml version="1.0" encoding="UTF-8"?>
<StyledLayerDescriptor version="1.0.0" xsi:schemaLocation="http://www.opengis.net/sld StyledLayerDescriptor.xsd"
 xmlns="http://www.opengis.net/sld" xmlns:ogc="http://www.opengis.net/ogc" xmlns:xlink="http://www.w3.org/1999/xlink"
 xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
 <NamedLayer>
 <Name>Roads</Name>
 <UserStyle>
 <FeatureTypeStyle>
 <Rule>
 <Title>Roads</Title>
 <LineSymbolizer>
 <Stroke>
 <CssParameter name="stroke">
 <ogc:Literal>#000000</ogc:Literal>
 </CssParameter>
 <CssParameter name="stroke-width">
 <ogc:Literal>1</ogc:Literal>
 </CssParameter>
 </Stroke>
 </LineSymbolizer>
 <TextSymbolizer>
 <Label>
 <ogc:PropertyName>name</ogc:PropertyName>
 </Label>
 <LabelPlacement>
 <LinePlacement>
 <PerpendicularOffset>
 10
 </PerpendicularOffset>
 </LinePlacement>
 </LabelPlacement>
 <Fill>
 <CssParameter name="fill">#000000</CssParameter>
 </Fill>
 <VendorOption name="repeat">400</VendorOption>
 </TextSymbolizer>
 </Rule>
 </FeatureTypeStyle>
 </UserStyle>
 </NamedLayer>
</StyledLayerDescriptor>`