Kiroid

Hello :) I'm Kirill from Ukraine. Help me please, I have a trouble with 0...30V Stabilized Power Supply. I've just finished upgrading construction from original circuit to new one (with new TLE2141 opamps and trimpots connections fixed and BD139 instead of 2n2219). I have transformer rated 30V, 6A and 10mFx63V capacitor for C1. And I've got such problem: voltage regulation works fine, except that fact, that I can't establish zero output voltage when Vreg pot is set to 0 - I have about 25 mV on output terminals. But that fact doesn't bother me: I suspect that trimpot I used is slightly poor :) Other thing drives me mad: output current never rises more, than 1.2 A :( It seems that current limiting part working correct, because under the load LED glows only when current limiting pot is at 1/3 of full range from minimum (1/3 - it's exactly ~1.2 A), than it fades, just like source has out from current limiting mode. But the output current still remains 1.2 A. For more clean scene: I set output voltage to 35V, and set current limiting threshold to 0 - LED switches on, as it supposed to. Then I connect load - 5 Ohms resistor to output and increase current limiting threshold. Voltage on the load rises to about 6 Volts, and current, respectively, to 1.2 A. Voltage at U3 pin 3 = 0.56V, as it should be. LED switches off, but voltage and current still remains the same, even if current limiter is set to max, as though something else limiting the output current %) Any ideas?