LO v3.4 + Windows 7 x64 does not recognize JRE v1.7 x64. Why not?

How can I get base to recognize my installed jre?
LO 3.4;
Windows 7, 64;
jre1.7.0_03_x64

Thanks

LibreOffice 3.4.5 uses Java 1.7 but since it is a 32bit application it does not recognize the x64 Java version.
You need to install the 32bit (aka x86) Java version.