Current sensing using OP07
The OP-07 can only handle input voltages within about 2V of the rails, so for a single 6V supply (the minimum recommended) it can handle voltages from 2V to 4V approximately. 

Further, the output can only reliably swing to within about 3V of each supply. 

Any of the three above reasons is enough to cause your circuit not to work. 



So if you gave your OP-07 supplies of +15/-5V it would sort-of work, however this is a really bad way to measure high-side current. The resistor matching will dominate the error. Typical Vos is 30uV, however a tiny 0.1% error in resistor matching will cause an error more than two orders of magnitude higher. Even if you put a fussy trimpot in there, it will drift away from temperature, aging or whatever. 

Pick a better circuit for high side current measurement!