First, you have a silly error in the value for the position. Your starting point is ten times higher than the end (70455115 > 7042353). You probably missed a number at the end of the ending position.
Some other tips for making links to an UCSC browser:
to customize which tracks are shown, add them in the form &trackShortName=visualizationLevel at the end of the URL. To get the ShortName of a track, click on it and access to its documentation page (see example). The correct short name can be found in the URL of the documentation page, as the value of the ?g= parameter. The visualization level can be usually be one of hidden, squish or full.
for enhanced customizations, have a look at the Sessions feature.