Hi,
That schematic looks a bit strange to me.....

First, there doesn't seem to be any low side supply voltage (Vcc) as pin 3 seems to not be connected to anything except the bootstrap capacitor and diode. Only the logic supply (Vdd) seems to actually be connected to any supply rail.

Second, even if pin 3(Vcc) and 9(Vdd) ARE connected they are both connected to +5V while the datasheet for the IR2110 calls for a Vcc of 10-20V. The undervoltage protection for the low the side supply (Vcc) kicks in at around 8V which means the bridge drivers aren't even operating.

/Henrik.