The "enigma2-plugin-extensions-enigmatv_1.1_oe2.0_mips32el.ipk" should work, but I will have to test...

Are you sure you uploaded it properly (Binary and not ASCII) to the box ? And it's not corrupted ?

TS
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DM8000, DM800se, DM500HD, DM800HD, DM7025, DM7020s, DM7000, DM500s
VU+ Solo, VU+ Uno, VU+ Duo, Kathrein UFS910
Tivusat, TNTSat, Fransat, SSR/TSR, BBC1-2-3/ITV
DE-OpenBlackHole 1.4 image : http://www.openblackhole.com/