I am playing an Aetherflux Reservoir combo deck with this decklist.

Deck
4 A-The One Ring (LTR) 246
3 Wastes (OGW) 186
4 Karn, the Great Creator (BLC) 73
4 Coldsteel Heart (CSP) 136
4 Guardian Idol (JMP) 467
4 Mind Stone (WTH) 153
1 Karn's Sylex (DMU) 234
4 Powerstone Shard (DAR) 227
1 Aetherflux Reservoir (BRR) 2
3 Mystic Forge (BRR) 36
1 Ugin, Eye of the Storms (TDM) 1
3 Paradox Engine (KLR) 259
2 The Mightstone and Weakstone (BRO) 238
4 Buried Ruin (JMP) 491
1 Demolition Field (FIC) 385
4 Radiant Fountain (M21) 248
4 Zhalfirin Void (DAR) 249
1 Replicating Ring (KHM) 244
4 Adventurer's Inn (FIN) 271
4 Rumble Arena (TLA) 277

Sideboard
1 Karn's Sylex (DMU) 234
1 Aetherflux Reservoir (BRR) 2
1 Mystic Forge (BRR) 36
1 Forsaken Monument (ZNR) 244
1 Paradox Engine (KLR) 259

Once I get to 50 life and try to activate aetherflux reservoir, I am not able to click it at all or activate it.